Gingras Lauren, Cui Wei, Schiff-Kearn Aidan W, Ménard Jean-Michel, Cooke David G
Opt Express. 2018 May 28;26(11):13876-13882. doi: 10.1364/OE.26.013876.
Control over the spectral phase of a light pulse is a fundamental step toward arbitrary signal generation in a spectral band. For the terahertz spectral regime, pulse shaping holds the key for applications ranging from ultra-high speed wireless data transmission to quantum control with shaped fields. In this work, we demonstrate a technique for all-optical and reconfigurable control of the spectral phase of a light pulse in the important terahertz (THz) band. The technique is based on interaction of a guided THz pulse with patterned photoexcited regions within a uniform silicon-filled parallel-plate waveguide. We use this platform to demonstrate broadband and tunable positive and negative chirp of a THz pulse, as well as control of the pulse carrier envelope phase.
控制光脉冲的光谱相位是在光谱波段中实现任意信号生成的基本步骤。对于太赫兹光谱区域，脉冲整形是从超高速无线数据传输到利用整形场进行量子控制等各种应用的关键。在这项工作中，我们展示了一种在重要的太赫兹（THz）波段对光脉冲光谱相位进行全光和可重构控制的技术。该技术基于引导的太赫兹脉冲与均匀填充硅的平行板波导内的图案化光激发区域的相互作用。我们利用这个平台展示了太赫兹脉冲的宽带可调正负啁啾，以及对脉冲载波包络相位的控制。
